Abstract
Early leaf spot (Cercospora arachidicola) and late leaf spot (sporidium personatum) are major limiting factors to groundnut productivity in northern Ghana. Fourteen groundnut entries were evaluated for two seasons (2003 and 2004) at Nyankpala with and without tebuconazole fungicide application. The objective of this study was to determine the yield losses due to combined attack of both diseases, with and without using tebuconazole (Folicur 3.6F) at 0.22 kg a.i. ha-1. The experiments were established in a split-plot design with three replications. Disease rating and pod yield were recorded at harvest maturity. Yield losses varied considerably, depending on entry and its yield potential. Pod yield losses due to both diseases ranged from 9.7 to 81.2 per cent in 2003, and from 19.5 to 65.9 per cent in 2004 when yield of protected entries was compared with yield of unprotected entries. The application of fungicide was effective in controlling leaf spots and improved pod yields across the two seasons. Some entries treated with fungicide produced pod yield of 1,860 to 2,081 kg ha-1, which is more than 2 to 2½-fold increase over present average yields in Ghana. Based on the high yield losses, chemical control and host-plant resistance options for managing both diseases in the north are recommended to enhance groundnut production. La tache à feuilles précoce (Cercospora arachidicola) et la tache à feille tardice (Cercosporidium personatum) sont des facteurs contraignants majeurs à la productivité d\'arachide dans le nord du Ghana. Quartorze variétés d\'arachide étaient évaluées pour deux saisons (2003 et 2004) à Nyankpala avec ou sans application de fongicide. Le but de ce travail de recherche était de déterminer les pertes de rendement en raison d\'attaque combinée des deux maladies en utilsant tébuconazole (Folicur 3.6F) à 0.22 kg a. i./ha. Les expériences étaient étabiles dans un dessin de lot-divisé avec trois répétitions. L\'indice de maladie et le rendement de cosse dues aux deux maladies variant entre 9.7 et 81.2% en l\'année 2003 et entre 19.5 et 65.9% en l\'année 2004 lorsque le rendment des varétés protégées avec fongicide était comparé avec le rendement des variétés non protégées. Application de fongicide était efficace dans la lutte contre les taches à feuille et améliorait également les rendements de cosse au cours de deux saisons. Quelques variétés traitées de fongicide donnaient un rendement de cosse de 1,860 à 2,081 kg/ha qui est plus 2 ou 2½ fois d\'augmentation par rapport aux randements moyens actuels au Ghana. Fondé sur les pertes de tendement élevées, l\'enrayement chimique et les options de plante-hôte résistante sont recommandés pour la lutte contre les deux maladies dans le nord afin d\'améliorer la production d\'arachide. Ghana Journal of Agricultural Science Vol. 40 (1) 2007: pp. 21-27
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Claims 7
Claim · model-written summary
Combined leaf spots caused 9.7 to 81.2 per cent pod yield loss in 2003.
- Taxon
- groundnut
Arachis hypogaeat0 - Interactor
- Cercospora arachidicolaMycosphaerella arachidise1pathogen
- Second interactor
- sporidium personatume1pathogen
- Outcome
- Pod yield lossese0
- Value
- 9.7 to 81.2 per cente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pod yield losses due to both diseases ranged from 9.7 to 81.2 per cent in 2003”
e1“Early leaf spot (Cercospora arachidicola) and late leaf spot (sporidium personatum)”
t0“groundnut”
Claim · model-written summary
Combined leaf spots caused 19.5 to 65.9 per cent pod yield loss in 2004.
- Taxon
- groundnutArachis hypogaeat0
- Interactor
- Cercospora arachidicolaMycosphaerella arachidise1pathogen
- Second interactor
- sporidium personatume1pathogen
- Outcome
- Pod yield lossese0
- Value
- 19.5 to 65.9 per cente0
- Comparator
- protected entriese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pod yield losses due to both diseases ranged from 9.7 to 81.2 per cent in 2003, and from 19.5 to 65.9 per cent in 2004 when yield of protected entries was compared with yield of unprotected entries”
e1“Early leaf spot (Cercospora arachidicola) and late leaf spot (sporidium personatum)”
t0“groundnut”
Claim · model-written summary
Fungicide controlled leaf spots.
- Taxon
- groundnutArachis hypogaeat0
- Treatment
- fungicidee0
- Interactor
- Cercospora arachidicolaMycosphaerella arachidise1pathogen
- Second interactor
- sporidium personatume1pathogen
- Outcome
- leaf spotse0
- Direction
- controllinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The application of fungicide was effective in controlling leaf spots”
e1“Early leaf spot (Cercospora arachidicola) and late leaf spot (sporidium personatum)”
t0“groundnut”
Claim · model-written summary
Fungicide improved pod yields across both seasons.
- Taxon
- groundnutArachis hypogaeat0
- Treatment
- fungicidee0
- Outcome
- pod yieldse0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The application of fungicide was effective in controlling leaf spots and improved pod yields across the two seasons”
t0“groundnut”
Claim · model-written summary
Some fungicide-treated entries yielded 1,860 to 2,081 kg ha-1, more than twice Ghana average yield.
- Taxon
- groundnutArachis hypogaeat0
- Treatment
- fungicidee0
- Outcome
- pod yielde0
- Direction
- increasee0
- Value
- 1,860 to 2,081 kg ha-1e0
- Comparator
- present average yields in Ghanae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Some entries treated with fungicide produced pod yield of 1,860 to 2,081 kg ha-1, which is more than 2 to 2½-fold increase over present average yields in Ghana”
t0“groundnut”
Claim · model-written summary
Chemical control is recommended to manage both leaf spots.
- Taxon
- groundnutArachis hypogaeat0
- Outcome
- chemical controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“chemical control and host-plant resistance options for managing both diseases in the north are recommended”
t0“groundnut”
Claim · model-written summary
Host-plant resistance is recommended to manage both leaf spots.
- Taxon
- groundnutArachis hypogaeat0
- Outcome
- host-plant resistance optionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“chemical control and host-plant resistance options for managing both diseases in the north are recommended”
t0“groundnut”
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See all 8 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.